Typewriting machine



Filed Oct. 26. 1929 4 Sheets-Sheet 1 gwvenkw Nov. 3, 1931. c. A.JOERISSEN TYPEWRITING MACHINE Filed 001;. 26, 1929 4 Sheets-Sheet 2gwuento o dumm Nov. 3, 1931. c; A. JOERISSEN TYPEWRITING MACHINE 4Sheets-Sheet 3 Filed 001:. 26. 1929 gwomtoc Nov. 3, 1931. c. A.JOERIS'S'EN TYPEWRITING MACHINE Filed Oct. 26. 1929 Patented Nov. 3,1931 UNITED STATES CARL A. JOERISSEN, OF WASHINGTON, DISTRICT OFCOLUMBIA TYPEWRITING MACHINE Application filed October 26, 1929. SerialNo. 402,751.

' The present invention relates to improvements in typewriting machines,and consists in the novel construction and arrangement of parts thatwill be hereinafter fully de-. scr'bed'and pointed out.

The primary object of the invention is to provide a typewriting machinewhich will be relatively noiseless in operation.

In the operation of typewriting machines as commonly constructed,difficulty is experienced in simultaneously producing a plurality ofcopies, the impressions on each of which will be equally clear. In theforms of machines heretofore proposed, in which the type bar commonlyswings about a relatively fixed pivot, or the path of the travel of thetype head is the arc of a circle, the contact between the type and theplaten will be affected by the number of sheets of paper interposedbetween them. That is, when a single sheet of paper, for example, is inthe machine, the final portion of the movement of the type head intoprinting relation with the platen will cause the type to strike squarelyagainst the platen, or produce a uniform impression throughout the typeface. If, however, a plurality of sheets of paper are introduced, theadditional thickness will cause the impression to be partly produced 39before the type face has come into exact vertical position and the angleat which said face contacts with'the outer or intermediate sheets willbe such as not to produce a clear and uniform impression on each of thesheets. To avoid this objectionable feature is one of the objects of thepresent improvements.

Referring to the drawings:

Figure 1 is a view in elevation of a type bar action embodying thepresent invention, showing the type bar at rest or in normal position. f

Figure 2 is a similar view, showing the arrangement of the several partswhen the type bar is in printing relation to the platen.

Figure 3 is a similar View illustrating a slightly modified form of typebar actuating means Figure 4 is a similar View of another modification.

Figure 5 is a view of a slightly different form of actuating means forthe type bar, the bar being shown in its position of rest, ornon-print.ng relation to the platen.

Figure 6 is a view of the construction shown in Figure 5, with the typebar in printing relation to the platen.

Figures 7 and 8 are details on an enlarged scale.

Figure 9 is an elevation of another slightly different embodiment of theinvention, showing the type carrier in non-printing position.

Figure 10 is a similar view, with the type bar in approximately printingrelation to the platen.

Figure 11 is a detail, on an enlarged scale.

It will be understood that in the drawings only the connections betweenthe type carrierand the cooperating actuating member or key are shown,and several of the parts of the mechanism are illustrated more or lessconventionally and diagrammatically.

Referring to the drawmgs, l designates the platen of a typewritingmachine, which may be of any well known or suitable construction, and inFigures 1 to 6 inclusive, the type carrier is of the ordinary form of abar 2, having at one end a type head 3 and supported adjacent its otherend in a suitable segment-like portion of the frame 4, so that it canmove in a curved path from a substantially horizontal position of restto a substantially vertical position, in which the type thereon will bein printing relation to the platen 1.

As usual, the outer ends of the type bars are shown as supported by arest 5, when the type bars are in normal, inactive, position.

It will be understood that the drawings illustrate but one of a seriesof type actions, one for each type bar, and that the frame members 4, 5,are in the form of segments or curved in the direction of their length.The connections between the type bars adjacent the ends of the segmentsand their actuating keys will be suitably bent and of different lengthsfrom the type action illustrated, which is assumed to be one of thoserela-. tively near the center of the segment so that all of the partsare in substantially the same vertical plane.

As shown, each type bar 2 is provided adjacent the type head with a slot6, through which extends a pin on a sleeve 7, carried by an arm 8 thatis pivotally mounted, as at 9, on the segment 4.

Near its other end each type bar is provided with two slots 10, 11,extending generally at approximately right angles to each other, theslot 10 being longitudinally curved, and through these slots extendrelatively stationary guide rods or pins 12, 13. As the arm 8 is swungabout its pivot or axis 9, the type bar will be caused to travel in acurved, noncircular path to bring the type head thereon into printing reation with the platen. In this movement it will be seen, by comparingFigures 1 and 2, for example, the arm 8 will travel in a circular pathabout the axis 9, but owing to the sliding connection between the typebar and said arm, the bar will be moved through a path which is notcircular or concentric with a definite axis or substantially parallel tothat of the arm, and. as shown by the dotted lines in Figure 2, theportion of this path adjacent the platen 1 will be on substantially astraight, horizontal, line, so that regardless of the number of sheetsof paper nterposed between the type head and platen. the type face willstrike the platen squarely and produce a uniform impression on each of'the several sheets.

The particularmeans shown for swinging the type bar from its normal,substantially horizontal, position of rest shown in Figure 1, tosubstantially vertical position, or into printing relation to theplaten, as shown in Figure 2, includes a normally collapsed toggle, themembers 14, 15, of which are respectively pivoted to the lever arm 8,and a support 16, which is pivotally connected, as at 17, to the frameof the typewriting machine.

The toggle member 15 is connected by a link 19 with the lon er arm 20 ofa twoarmed lever suitably ulcrumed at 21 on the machine frame, and theshorter arm 22 of which is provided with a pin 23, shown as engaging afork in the upper end of a swinging arm 24. The arms 24, one for eachtype action, are all mounted on a fulcrum rod 25,

and each is connected by a link 26 with a suitable key lever 27. v

The lever 20, 22, is also connected by a link 28, with the aforesaidpivotally mounted support for the forward end of the type bar actuatingtoggle.

WVhen the key lever 27 is depressed or rocked about its fulcrum, it willbe seen that the lever 20, 22, will be rocked to effect an expansion ofthe type bar actuating toggle and the parts caused to move from thepositions shown in Fig. 1 to those shown in Fi 2.

As the members 14, 15, of the type iar actuating toggle come intoexpanded relation, as shown in Fig. 2, the swinging movement ofthe typebar is slightly checked and the completion of the movement of such barinto printing relation with the platen is effected by arocking of thepivotally mounted toggle support 16.

30 designates a universal bar, which extends beneath all of the keylevers 27 of the machine, and the said bar is connected approximatelymidway of its lengtlrto a lever 31, which engages, and is adapted toactuate a member 32 of the carriage feed escapement devices. Anauxiliary universal bar 33 is arranged in the path of the several leverarms 8, so as to be struck by said arms as the associated type bar comesinto approximately printing relation to the platen, said auxiliaryuniversal bar being connected with the carriage escapement feed devicesby a rod 34.

lVith the arrangement described and illustrated, it will be seen thatmovement of the carriage feed escapement devices will be initiated bydepression of any one of the key levers 27, and will be completed, inone direction, by the contact of the lever arms 8 connected to theseveral type bars, as the bars come into printing relation to theplaten.

In the embodiment of the invention illustrated in Figure 3, the togglemember 15 1s provided with a slightly offset portion 15a, to which thelink 19a is pivotally connected, and the actuating lever has its arms2'Oaand 21a of substantially the same length, the link 28 beingconnected to a lug 21?) on said lever. In this form of the inventionalso the lever arm 24a is arranged substantially horizontal, having apin thereon extending into a fork 1n the lever arm 21a.

The embodiment illustrated in Figure 4 difi'ers but slightly from thatof the preceding'figures. In this embodiment each key lever 27 isprovided with an upwardly extending lug 27a, which is provided with apin that extends into a slide in the substantially horizontal member ofa bell crank lever 35, the other arm of which is connected by a link 36with an arm 37 attached to the twoarmed lever 20a, 21a.

In the embodiment of the invention illustrated in Figures 5 to 8, themember 14a of the type bar actuating toggle is connected directly to thetype bar, and in order that the bar may travel through the curved, butnoncircular, path, an eccentric is interposed in the connection betweenthe bar and pivotally mounted support for the forward end of theactuatin toggle.

Specifically, this eccentric connection is the eccentric 41, and as thetoggle is expanded and the members 14a, 15a, thereof come.

into substantial alignment, the pin 42 moving in the slot 43 will effecta slight rotation of the eccentric 41, thus, in efi'ect, len thening thetoggle and causin the type ar to move through the path be ore referredto.

In the embodiment of the invention illustrated in said Figures 5 to 8,the manually operable key is not provided at the forward end of ahorizontal lever, but engages an arm 51 of a bell crank, the other armof which is connected by a link 52 with the arm 22 of the two-armedlever that efiects expansion of the normally collapsed toggle.

In this embodiment of the invention also, the auxiliary universal bar 33is actuated by a portion of the type bar itself contacting with apivotally mounted member 55 that extends across said universal bar.

In the embodiment of the invention illustrated in Figures 9 and 10, thetype head 3a is mounted directly on the member 14b of the actuatingtoggle, the other member 15b of which is, as in the forms previouslydescribed, supported by the pivotally mounted member 16. A carrier linkhaving slots 61 62, corresponding to the slots 10 and 11 of the type barof the embodiment of the invention illustrated in Figures 1 and 2, forexample, connects the type carrying toggle member with the segment 4 andthe toggle members are connected by an eccentric so that the type headwill travel in the desired curved, non-circular, path in moving from thenormal substantially horizontal position of Figure 9, to thesubstantially vertical position or printing relation to the piston shownin Figure 10. K

It is believed that the operation and advantages obtained by theinvention will be readily understood and appreciated from the foregoingdescription and the drawings. It will be noted that in each of theembodiments of the invention illustrated the type are caused to travelfrom a normal, substantially horizontal, position to printing relationwith the platen through a curved, but non-circu lar path.

That is, the type are not, as has heretofore been the common practice,caused to move about a fixed pivot, or to travel in a path which is thearc of a true circle, but the path of travel is of such form that theface of each type is in a substantially vertical plane slightly beforecoming into exact printing relation to the platen so that whether one ora plurality of sheets of paper be interposed between the platen andtype, all parts of the face of the type will simultaneously contactwith-the ribbon by. which the impression on the paper is produced. Thecurved, but noncircular, path of travel of each type is such that theportion thereof immediately adjacent the platen is along a substantiallyhorizontal line as distinguished from the constructions heretoforeproposed, in which, particularly when a plurality of sheets of paper areto be simultaneously impressed or printed upon, the plane of the typeface is oblique to the vertical plane including the forward end of thehorizontal diameter of the platen.

The particular means for actuating the type carrier, namely, a normallycollapsed toggle, the forward end of which is connected to a pivotallymounted supporting member acts to cause the type to efi'ect a printingoperation with a minimum amount of noise.

There can, of course, be modification in many of the details illustratedwithout departing from the invention, and, as before noted, the severalviews are more or less diagrammatic and several of the parts are shownconventionally. Except as particularly defined in the following claims,the invention is not to be understood as being limited to the exactdetails shown.

I claim:

1. In a typewriting machine, the combination of a platen,-a type barhaving a type head at one end and provided near its other end with twoguide slots extending substantially at right angles to each other, fixedguide rods extending through said slots, a pivotally mounted armconnected with the type bar by a connection permitting relative movementbetween the arm and bar in the direction of the length of the latter,and means for rocking said arm to carry the type bar from asubstantially horizontal position to a substantially vertical positionand move the type head into printing relation to the. platen with twoguide slots extending substantially, at right angles to each other,fixed guide rods extending through said slots, a pivotally mounted armconnected with the type bar by a connection permitting relative movementbetween the arm and bar in the direction of the length of the latter, anormally collapsed toggle for rocking said arm to carry the type barfrom a substantially horizontal position to a substantially verticalposition and move the type head into printing relation to the platenthrough-a curved, non-circular, path.

3. In a typeWriting machine, the combination of a platen, a type carriermounted to move in a non-circular, curved, path to and from printingrelation to the platen, and means for moving the type carrier toprinting position including a normally collapsed toggle and a pivotallymounted member connected to the end of the'toggle remote from the typecarrier, movement of the type carrier toward the platen being checked byexpansion of the toggle, prior to the carriers reaching printingposition, and being completed by movement of said pivotally mountedmember.

4. In a typewriting machine, the combination of, a platen, a typecarrier mounted to 5 move in a curved path to and from printing relationto the platen, and means for moving the type carrier to printingposition including a normally collapsed toggle, one member of which isconnected to the type carrier, and a pivotally mounted member connectedto the end of the toggle .remote from the type carrier, the connectionbetween the type carrier and said pivotall mounted member including aneccentric w ereby the length of the toggle is increased during movementof the type carrier toward printing relation to the platen.

5. In a typewriting machine, the combination of a platen, a type carriermounted to move in a non-circular, curved, path to and from printingrelation to the platen, and means for moving the type carrier toprinting position including a normally collapsed toggle, a pivotallymounted support for the end of the toggle remote from the type carrier,a lever havin one arm connected to said pivotally mounted support, alink connection between said lever arm and the toggle, whereby thelatter will be expanded as the lever is rocked about its fulcrum, and amanually operable key adapted to rock said lever, movement of the typecarrier to printing position being checked as the toggle reachesexpanded position and completed by" rock- 35 ing of said pivotallymounted support.

6. In a typewriting machine, the combination .of a platen, a typecarrier mounted to move to and from printing relation to the platen, andmeans for moving the type carrier to printing position including anormally collapsed toggle and a pivotally mounted member connected tothe end of the toggle remote from the type carrier, the. connectionbetween the type carrier and said pivotally mounted member including aneccentric whereby the length of the toggle is increased during movementof the type carrier toward printing relation to the platen, suchmovement being checked as the toggle reaches its maximum expandedposition and completed by a rocking of said pivotally mounted member.

7. In a typewriting machine, the combination of a platen, a type carriermounted to move to and from printing relation to the platen, and meansfor movlng the type carrier to printing position including a normallycollapsed toggle, the members of which are connected by an eccentricjoint, whereby 60 the length of the toggle will be increased as itreaches its maximum expanded posit on while moving the type carrier intoprinting relation to the platen.

8. In a typewriting machine, the combination of a platen, a type carriermounted to my hand.

CARL A. JQERISSEN.

